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Message: <blockquote data-quote="ehoe" data-source="post: 73902" data-attributes="member: 141">Just curious too, got a friend whom wants to convert his M20B20 to a M20B25 and his mechanic told him that he can reuse back the existing DME/ECU of the M20B20 for the M20B25. Apparently the DME on the 2.0/2.5 are more of less the same. And since the 2.5 shares almost all identical parts (i.e AFM, alternator, etc,etc) as the 2.0, it is not required to buy a full half cut. Just then 2.5 engine will do so its a little cheaper. He even went as far to say that the current SuperChip that is being used in the M20B20 DME can be also reused for the 2.5 after the conversion. I'm a little curious, wouldn't the 2.5 use different fuel/air mappings, etc and as such require the 2.5 DME?. Not being so electronically inclined myself but common sense would dictate that the 2.0 DME may not be the optimal DME for a 2.5. Any of the sifu's out there care to verify on this?. What are the pro's & con's of using the 2.0 DME on a 2.5?. Hope someone can explain in mode detail..... thanks.  <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite11" alt=":rolleyes:" title="Roll Eyes    :rolleyes:" loading="lazy" data-shortname=":rolleyes:" /></blockquote>